/Engine/Source/Runtime/Experimental/ChaosVehicles/ChaosVehiclesCore/Public/TransmissionSystem.h
Typical gear ratios: Reverse −4.181, 1st 3.818, 2nd 2.294, 3rd 1.500, 4th 1.133, 5th 0.911 Source: Georg Rill. Road Vehicle Dynamics: Fundamentals and Modeling (Ground Vehicle Engineering Series) (p. 121). CRC Press.
namespace Chaos { enum ETransmissionType { Manual, Automatic, } }